Metal cabinet panel and processing method thereof

Abstract

The invention relates to the technical field of metal cabinet panel processing, in particular to a metal cabinet panel and a processing method thereof.The metal cabinet panel comprises a cabinet panel body, the cabinet panel body comprises a first face and a second face, the first face faces the outside of a metal cabinet, and the second face faces the inside of the metal cabinet; the shutter opening is formed in the surface of the cabinet plate main body; the shutters are arranged in the shutter opening in an array mode, each shutter comprises an outer-layer metal plate and an inner-layer metal plate which are connected with each other, micro protrusions are arranged on the surface of each outer-layer metal plate in an array mode, and the gap between the micro protrusions is smaller than the diameter of the section of each micro protrusion; microgrooves are formed in the surface of the inner-layer metal plate and extend in the length direction of the shutter, and the diameter of the section of each micro protrusion is smaller than the width of the corresponding microgroove; wherein the shutters are obliquely arranged in the shutter openings, the inner-layer metal plate faces the first face, water vapor is adsorbed into the microgrooves and flows along the microgrooves under the action of gravity, and the effect that water is drained from the outer layer and the inner layer through structure arrangement is achieved.

Description

Technical Field

[0001] This invention relates to the field of metal cabinet panel processing technology, and in particular to a metal cabinet panel and its processing method. Background Technology

[0002] Metal cabinets play a vital role in modern industrial production. They typically house sophisticated electronic components, control systems, and power distribution equipment. To ensure the stable operation of these devices, the cabinet panels must provide effective ventilation and heat dissipation as well as reliable environmental protection.

[0003] In high-temperature and high-humidity industrial environments, where relative humidity consistently exceeds 80%, dense perforations or louver-style openings are punched into the metal panels to maintain the heat dissipation function of metal cabinets. Louver-style heat dissipation is the primary choice. Louvers are made of aluminum alloy or stainless steel profiles bent into louver shapes. Through the design of the blade angle and the coating on the louver surface, external water droplets can be prevented from entering the cabinet and internal moisture can be expelled to some extent. However, hydrophobic coatings are chemical functional layers. Under the influence of outdoor ultraviolet radiation, wind and rain, mechanical friction, and corrosive industrial atmospheres, they will gradually powder and peel off. The hydrophobic performance usually deteriorates rapidly within 1-3 years, requiring recoating, which is cumbersome to maintain. Moreover, it only solves the problem of external water adhesion. In industrial production, internal moisture will accumulate over a long period of time and condensation will occur. The hydrophobic coating is completely powerless to actively guide internal condensation. In fact, the surface hydrophobicity may even cause condensation droplets to roll more easily to places they shouldn't go, leading to mechanical failure. Summary of the Invention

[0004] Therefore, the purpose of this invention is to overcome the problem that in the prior art, metal cabinet panels can only be hydrophobic through coatings. In high-temperature and high-humidity industrial environments, the hydrophobic coatings will quickly fail, thereby corroding the louvers of the metal cabinet panel and causing a decrease in the waterproofing ability of the metal cabinet panel. Specifically, this invention provides a metal cabinet panel and its processing method, which realizes physical drainage through microstructures, thereby improving the waterproofing ability and waterproofing time of the metal cabinet panel.

[0005] To solve the above-mentioned technical problems, the present invention provides a metal cabinet panel, comprising: The cabinet panel body includes a first side and a second side, the first side facing the outside of the metal cabinet and the second side facing the inside of the metal cabinet; Louvers are formed on the surface of the cabinet panel body; Several louvers are arranged in an array within the louver opening. Each louver includes an outer metal plate and an inner metal plate that are interconnected. The surface of the outer metal plate is provided with an array of micro-protrusions, and the gap between the micro-protrusions is smaller than the cross-sectional diameter of the micro-protrusions. The surface of the inner metal plate is provided with micro-grooves that extend along the length of the louver, and the cross-sectional diameter of the micro-protrusions is smaller than the width of the micro-grooves. The louvers are inclinedly disposed within the louver opening, with the inner metal plate facing the second surface. Water vapor is adsorbed into the micro-groove and flows along the micro-groove under the action of gravity. The outer metal plate faces the first surface, and water droplets converge on the surfaces of two adjacent micro-protrusions and flow along the surface of the louvers under the action of gravity.

[0006] In one embodiment of the present invention, the outer metal plate of the louver is tilted at an angle between 120° and 135° relative to the horizontal plane.

[0007] In one embodiment of the present invention, the cross-sectional diameter of the micro-protrusion gradually increases from the top to the bottom, the top of the micro-protrusion forms a hydrophobic portion, and the bottom of the micro-protrusion forms a support portion.

[0008] In one embodiment of the present invention, the cross-sectional diameter of the hydrophobic portion is 1 / 2 of the cross-sectional diameter of the support portion.

[0009] In one embodiment of the present invention, an interlayer is provided between the outer metal plate and the inner metal plate, and the interlayer is an integrally molded injection molded part.

[0010] In one embodiment of the present invention, a cavity is formed in the interlayer, the cavity includes several adhesive joints, the openings of the adhesive joints face the surfaces of the inner metal plate and the outer metal plate respectively, and an injection port communicating with the cavity is provided on one side of the interlayer.

[0011] In one embodiment of the present invention, based on the aforementioned metal cabinet panel, a processing method for processing the metal cabinet panel is proposed, comprising: S1: The metal cabinet panel blanks are die-cast separately to form the cabinet panel body. The louver openings for installing louvers are cut on the cabinet panel body. Then, the outer metal plate and inner metal plate are stamped separately to serve as louvers. S2: For the outer metal plate, a layer of UV-curable resin is uniformly spin-coated onto the surface of the outer metal plate using a hard mold with a micron array pattern. S3: After the UV-cured resin has been left to stand for 30 minutes, align the mold and press it onto the resin layer. Irradiate with a UV lamp for 10-30 seconds to cure the resin and form an array of micro-protrusions. S4: For the inner metal plate, an ultraviolet picosecond laser is used to generate a laser scanning path, and the inner metal plate is fixed on a precision two-dimensional platform. S5: The ultraviolet picosecond laser is focused on the surface. By controlling the laser power and scanning speed, the inner metal plate surface is scanned repeatedly 1-3 times to ablate microgrooves line by line. S6: Weld the formed outer metal plate and inner metal plate into a louver as a whole, and weld and fix multiple louver as a whole to the louver opening of the louver, with the inner metal plate facing the second side and the outer metal plate facing the first side.

[0012] In one embodiment of the present invention, an outer metal plate with micro-protrusions is placed in a custom fixture, exposing the top of the micro-protrusions. A protective gas is introduced and deposited on the surface of the outer metal plate, so that the surface of the micro-protrusions is gradually exposed to protective gases of different concentrations. The concentration of the protective gas at the bottom layer of the micro-protrusions is greater than that at the top layer of the micro-protrusions. Then, a corrosive gas is introduced to corrode the micro-protrusions, forming a gradient.

[0013] In one embodiment of the present invention, the processing method further includes: S5-1: The intermediate layer is manufactured by integral injection molding process, and the interlayer is melted into a continuous cavity by melting process, and the end of the cavity is provided with injection port and vent. S5-2: The outer metal plate, the sandwich structure, and the inner metal plate are stacked in sequence, and their injection port and exhaust port are connected to the vacuum injection system; first, the cavity inside the sandwich structure is evacuated, and then, under the condition of maintaining the vacuum, liquid epoxy resin is injected into the channel through the injection port until the epoxy resin overflows from the exhaust port, ensuring that the cavity and the gaps between the joint surfaces are completely filled; S5-3: The injected epoxy resin is cured under the set temperature conditions to combine the outer metal plate, the interlayer and the inner metal plate into a louver as a whole; then the injection port is sealed and the surface is treated.

[0014] In one embodiment of the present invention, the curing adopts a two-stage gradient heating process: the first stage is held at 50-60°C for 1-2 hours to allow the epoxy resin to initially gel and solidify; the second stage is heated to 80-90°C and held for 2-4 hours to improve the structural strength of the epoxy resin, and a constant gas pressure of 0.2-0.8 MPa is applied to the surface of the outer metal plate during the gradient heating curing.

[0015] Compared with the prior art, the above-described technical solution of the present invention has the following advantages: The metal cabinet panel of the present invention integrates inner and outer surfaces with opposite wetting properties on a single heat dissipation louver and, in conjunction with an inclined installation angle, realizes a two-way moisture management system. This system can efficiently repel liquid water from the outside through its structure and actively guide condensate water from the inside without the need for chemical coatings. Thus, while ensuring the heat dissipation requirements of the equipment, it achieves the effect of increasing the durability of environmental protection. The outer metal plate features micro-protrusions on its surface, creating a hydrophobic structure. These densely packed micro-protrusions with minimal gaps minimize the solid-liquid contact area and trap air within the gaps to form an air cushion. This allows water droplets to easily roll off under gravity, resulting in efficient and durable surface self-cleaning and waterproofing. The inner metal plate has microgrooves on its surface. These directional microgrooves actively adsorb and collect discrete condensed water droplets using capillary force, forming a continuous water film. This provides an efficient flow channel for subsequent gravity-driven drainage. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a structural schematic diagram of the main body of a metal cabinet panel in a preferred embodiment of the present invention; Figure 2 This is an exploded view of the louver portion in a preferred embodiment of the present invention; Figure 3 This is a cross-sectional view of the louver portion in a preferred embodiment of the present invention; Figure 4 This is a cross-sectional schematic diagram of the micro-protrusion in a preferred embodiment of the present invention; Figure 5 A process flow diagram of a metal cabinet panel processing method is shown in a preferred embodiment of the present invention. Figure 6 This is a process flow diagram of the interlayer portion of a metal cabinet panel processing method, as described in a preferred embodiment of the present invention.

[0018] Explanation of reference numerals on the accompanying drawings: Cabinet panel body; 11. First side; 12. Second side; 13. Louvered opening; Louver; 21, outer metal plate; 211, micro-protrusion; 2111, hydrophobic part; 2112, support part; 22, inner metal plate; 221, micro-groove; Interlayer; 31, cavity; 311, adhesive joint. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0020] The purpose of this invention is that in the prior art, metal cabinet panels can only be made hydrophobic through coating. In high-temperature and high-humidity industrial environments, the hydrophobic coating will quickly fail, thereby corroding the louvers 2 of the metal cabinet panel and causing a decrease in the waterproofing ability of the metal cabinet panel. Specifically, this invention provides a metal cabinet panel and its processing method, which realizes physical drainage through microstructure, thereby improving the waterproofing ability and waterproofing time of the metal cabinet panel.

[0021] refer to Figure 1 , 2 Specifically, a metal cabinet panel is provided, comprising: a cabinet body 1, the cabinet body 1 including a first surface 11 and a second surface 12, the first surface 11 facing outwards from the metal cabinet and the second surface 12 facing inwards from the metal cabinet; louvers 13, which are formed on the surface of the cabinet body 1; and a plurality of louvers 2, which are arranged in an array within the louver openings 13, each louver 2 including an outer metal plate 21 and an inner metal plate 22 connected to each other, the surface of the outer metal plate 21 being provided with an array of micro-protrusions 211, the gap between the micro-protrusions 211 being smaller than the micro-protrusions 211. The cross-sectional diameter of 11; microgrooves 221 are provided on the surface of the inner metal plate 22, the microgrooves 221 extend along the length of the louver 2, and the cross-sectional diameter of the micro-protrusions 211 is smaller than the width of the microgrooves 221; wherein, the louver 2 is inclinedly arranged in the louver opening 13, the inner metal plate 22 faces the second surface 12, water vapor is adsorbed into the microgrooves 221 and flows along the microgrooves 221 under the action of gravity, the outer metal plate 21 faces the first surface 11, water droplets gather on the surfaces of two adjacent micro-protrusions 211 and flow along the surface of the louver 2 under the action of gravity.

[0022] refer to Figure 1 , 2 As shown, the main body 1 of the cabinet is the primary component constituting the sidewalls, top wall, or door panels of the cabinet. It is typically made of galvanized steel, aluminum alloy, or stainless steel sheets with a thickness of 1.2mm to 2.0mm. This main body has a defined spatial orientation: its first side 11 faces the external environment after installation, directly exposed to rain, humid air, and even corrosive atmospheres; its second side 12 faces the internal space of the cabinet, directly adjacent to expensive electrical equipment, circuit boards, etc. In a predetermined area of ​​the main body 1, usually located on the upper part or side of the cabinet to facilitate the exhaust of hot air, louvers 13 are cut out using a CNC punch press or laser cutting machine. These louvers 13 are typically elongated rectangles, and their size determines the heat dissipation area. The cut edges need to be deburred and treated with anti-corrosion measures to prevent rust from starting at the cut. The louvers 13 serve as windows for installing functional louver units 2.

[0023] refer to Figure 1 ,2 As shown, each louver 2 is composed of two metal plates with special surface treatment, including an outer metal plate 21 and an inner metal plate 22. All louvers 2 are not installed horizontally or vertically, but are fixed at a certain angle inside the louver opening 13. During installation, the inner metal plate 22 faces inwards, and the outer metal plate 21 faces outwards. Regarding the outer metal plate 21: this plate is located on the outside of the louver 2, that is, the side closer to the first outer surface 11 of the cabinet after installation. Its core feature lies in its surface... Through micro-nano fabrication, an array of micro-protrusions 211 are formed. The gaps between these micro-protrusions 211 are strictly controlled to be smaller than the cross-sectional diameter of a single micro-protrusion 211. When external rainwater or condensed water droplets drip or splash onto the louver 2, the first thing to come into contact with is the array of micro-protrusions 211 on the outer metal plate 21. The surface of the micro-protrusions is coated with epoxy resin. Due to the hydrophobic properties of the micro-protrusions 211 and the lotus leaf effect generated by their dense arrangement, water droplets cannot wet the surface but remain nearly spherical. Under the influence of gravity along the inclined plane... Under the influence of the force on the panel surface, these water droplets easily roll off and are quickly drained from the cabinet surface, preventing them from seeping in. For the inner metal panel 22: this panel is located inside the louvers 2, that is, closer to the second inner surface 12 after installation. Its surface is precision-machined to form microgrooves 221 extending along the length of the louvers 2. The width of these microgrooves 221 is designed to be larger than the diameter of the outer micro-protrusions 2111. The wider channels facilitate the collection and guidance of a larger amount of condensed water film. Therefore, at high temperatures... In a high-humidity workshop, the air inside the cabinet is hot and saturated with humidity due to the heat generated by the equipment. When this hot and humid air comes into contact with the relatively cool inner wall of the cabinet and the inner metal plate 22 of the louvers 2, water vapor condenses into extremely fine water droplets or films. At this time, the microgrooves 221 on the surface of the inner metal plate 22 come into play. The hydrophilic properties of the groove walls, under the influence of capillary adsorption, cause the condensed water to spread preferentially within the grooves. Secondly, due to the tilt of the louvers 2, gravity generates a component force along the extension direction of the microgrooves 221. This component force, in conjunction with the capillary force, drives the liquid water gathered in the microgrooves 221 to flow downwards along the channels, eventually being collected and discharged outside the cabinet, rather than dripping disorderly onto the electrical components below. To ensure stable hydrophilicity, the spacing of the capillary microgrooves is set between 1μm and 3μm to maximize its hydrophilicity.

[0024] refer to Figure 1 , 2As shown, the angle between the outer metal plate 21 and the horizontal plane is between 120° and 135°, meaning that the louver 2 panel forms an angle of 50° to 60° with the horizontal line. This range is the optimal range determined through fluid dynamics simulation. When the angle is close to 120°, the panel surface is relatively steep, and the component of gravity along the panel surface is relatively large, which is conducive to the rapid rolling off of external water droplets. Water droplets can hardly stay on the hydrophobic surface and are quickly removed, resulting in extremely high waterproof efficiency. At the same time, the condensate in the internal microgrooves 221 also flows relatively fast, resulting in strong drainage capacity. However, an excessively steep angle may slightly increase the vertical projected area, which may result in slightly higher wind pressure under extreme wind and rain conditions. Additionally, the probability of deposition for dust drifting in from the horizontal direction may slightly increase. When the angle is close to 135°, the panel surface is relatively flat, with... While facilitating smooth airflow and improving ventilation and heat dissipation efficiency, reducing airflow noise, and enhancing the shielding effect against horizontal dust, the reduced gravitational force may cause larger water droplets to stagnate due to insufficient gravity to overcome surface tension or minor resistance, thus affecting drainage efficiency. Therefore, in the preferred embodiment, the tilt angle of the louver 2 is selected as approximately 125° as a benchmark to achieve optimal balance, thereby achieving external waterproofing and ensuring that the gravitational force is sufficient to drive most water droplets to roll off. Even with a large water flow, the surface remains relatively dry. The tilted panel also forms a physical flow guide surface, effectively drawing water away from the cabinet. Simultaneously, it also achieves internal flow guidance, ensuring that the condensate in the micro-groove 221 has a stable and continuous flow trend under gravity, preventing water droplets from accumulating in the micro-groove 221.

[0025] refer to Figure 1 , 2 As shown in Figure 4, in another embodiment, the cross-sectional diameter of the micro-protrusion 211 gradually increases from the top to the bottom, thereby forming a top hydrophobic portion 2111 and a bottom support portion 2112, specifically a truncated cone or pyramid shape. The minimum and optimal diameter of the top is 10-15 micrometers. As the height decreases, the diameter increases linearly or non-linearly, reaching its maximum at the bottom, with an optimal diameter of 25-40 micrometers. The total height of the protrusion is approximately 20-50 micrometers. Due to its small size, the hydrophobic portion 2111 has a very low actual contact area with water, resulting in a high contact angle to prevent water stagnation. The larger bottom diameter of the support portion 2112 provides significantly enhanced mechanical strength and a larger bonding area with the substrate.

[0026] refer to Figure 1 , 2As shown in Figure 4, the cross-sectional diameter of the hydrophobic part 2111 is approximately half the cross-sectional diameter of the support part 2112. This design takes into account that if the top diameter is too large, the hydrophobicity will decrease; if the top diameter is too small, although the hydrophobicity is excellent, the top structure is too small and is prone to breakage or bending from the root when subjected to scouring, wiping, or expansion due to freezing of condensate. Furthermore, experiments have shown that while maintaining excellent hydrophobic performance, the shear strength and fatigue life of the microstructure can be increased several times. At this point, the contact angle is greater than 150°, thereby ensuring that the hydrophobic microstructure will not be damaged on a large scale under long-term outdoor wind and rain scouring, daily maintenance and cleaning, or high-pressure air gun blowing inside the workshop.

[0027] refer to Figure 1 , 2 As shown in Figure 4, in general, the tapered design and optimized diameter ratio can withstand the physical friction, particle impact and thermal stress cycle that may exist in high temperature and high humidity workshops. The durability of the hydrophobic function depends not only on the initial chemical coating, but also on the integrity of the physical structure that supports the coating, ensuring that the micro-protrusion 211 itself is not easily damaged, thereby protecting the hydrophobic chemical layer on its surface. The effect of water droplets gathering and rolling off the micro-protrusion 211 can be maintained continuously, extending the service life of the structure.

[0028] refer to Figure 1 , 2 As shown in Figure 3, a sandwich layer 3 is provided between the outer metal plate 21 and the inner metal plate 22. The sandwich layer 3 is made of engineering plastic, mainly PPS polyphenylene sulfide, and is manufactured by an integral injection molding process. The sandwich layer 3 becomes the core skeleton connecting the inner and outer metal plates. It has high strength and dimensional stability. The thermal conductivity of plastic material is much lower than that of metal, and it will not be corroded and assimilated by metal. It can block the direct heat conduction and moisture transfer between the inner metal plate 22 and the outer metal plate 21 to a certain extent. This helps to reduce the internal condensation and corrosion caused by temperature difference. It also prevents the outer metal plate 21 from being corroded by moisture or acidic substances in the air, which would lead to the corrosion of the inner metal plate 22 and cause the louver 2 to fail as a whole. At the same time, plastic has damping properties and can absorb some vibration.

[0029] refer to Figure 1 , 2As shown in Figure 3, in order to increase the bonding strength of the interlayer 3, multiple cavities 31 are provided inside the interlayer 3. These cavities 31 are not solid, but form a three-dimensional adhesive channel network. Multiple openings, or bonding interfaces 311, are provided on the upper and lower walls of the cavities 31, facing the inner and outer metal plates 22 and 21. These bonding interfaces 311 guide the adhesive within the cavities 31 to the bonding interface with the metal plates. On one side of the interlayer 3, there are injection ports and vents communicating with the cavity 31 network. These are interfaces for connecting to external adhesive injection equipment. The outer metal plate 21, the injection-molded interlayer 3, and the inner metal plate 22 are aligned and stacked. At this point, the cavities 31 inside the interlayer 3 and the gaps between the three form a closed and interconnected cavity system. Low-viscosity epoxy resin is injected through the injection port, while a vacuum is drawn through the vent. Driven by the vacuum negative pressure, the adhesive quickly fills each cavity 31 and overflows evenly from each bonding interface 311, completely wetting and filling the inner and outer metal plates 21 and the interlayer. All microscopic gaps between layers 3; after the adhesive cures, a solid adhesive network is formed that runs through the entire cross section of the louver 2. This network completely seals off any possible path for moisture and dust to seep into the louver 2 unit. The adhesive firmly bonds the three layers of materials through the huge bonding area. Its overall tensile strength and shear strength exceed those of traditional spot welding or riveting. Moreover, the continuous adhesive layer can better absorb and disperse the stress caused by temperature changes, vibration or external impact, preventing the metal plate from deforming or the joint from fatigue cracking. Therefore, by setting a sandwich layer 3 between the outer metal plate 21 and the inner metal plate 22, a strong, non-deformable, and well-sealed louver 2 substrate is formed, providing a stable and reliable working base for the micro-protrusions 211 on the surface of the outer metal plate 21 and the micro-grooves 221 on the surface of the inner metal plate 22, preventing the function of the micro-protrusions 211 and the micro-grooves 221 from failing rapidly due to substrate deformation, corrosion or water seepage.

[0030] refer to Figure 5 As shown, in order to manufacture the louvers of the metal cabinet panel, so that the louvers can achieve the effect of making the outer layer hydrophobic and the inner layer guiding the water vapor to escape through structural design, a processing method for the metal cabinet panel is provided, the processing method including: S1: A large press is used to die-cast the metal coil to form the cabinet body 1 with reinforcing ribs. Then, a CNC laser cutting machine is used to precisely cut louvers 13 on the body. The heat-affected zone of laser cutting is small and the cut is smooth, which is better than traditional stamping. A precision stamping die is used to stamp the metal strip into blanks for the outer metal plate 21 and the inner metal plate 22 respectively. S2: For the processing of the outer metal plate 21, the outer metal plate 21 blank is fixed on a spin coater, and a layer of UV-curable resin with a thickness of about 10-30 micrometers is uniformly spin-coated on its surface. This resin is usually an acrylate, and its viscosity and surface tension need to be precisely controlled to ensure the formation of a uniform film. S3: A hard mold is manufactured using electroforming or silicon etching technology. Its surface is imprinted with an array of holes that complement the required micro-protrusion 211 array. After the resin has been allowed to stand and level for about 30 minutes, the resin is in the best imprinting state. The mold is precisely aligned and imprinted onto the resin layer. In order to ensure the imprinting quality of the micro-protrusion 211, the pressure needs to be precisely controlled to ensure that the resin completely fills the mold cavity without being excessively squeezed. Under the pressure, a high-intensity UV LED light source is used to irradiate for 10-30 seconds. The UV light triggers the resin to rapidly cross-link and polymerize, changing from a liquid state to a solid state, thereby accurately replicating the microstructure of the mold onto the resin layer to form a micro-protrusion 211 array that is firmly attached to the surface of the metal plate. S4: For the processing of the inner metal plate 22, an ultraviolet picosecond laser is used for laser grooving. The picosecond pulse width is extremely short, which can remove the material by cold processing. The heat-affected zone is very small, avoiding the generation of slag and micro-cracks, ensuring the smoothness of the groove wall. At the same time, the inner metal plate 22 blank is fixed on a two-dimensional platform driven by a high-precision linear motor. S5: Confirm the width, depth, and spacing data of the microgrooves 221 according to the design requirements, generate the laser scanning path, and adjust the diameter of the laser focusing spot to about 10 micrometers. By precisely controlling the laser pulse energy, repetition frequency, and scanning speed, the same groove path is scanned 1-3 times. The first scan forms a shallow groove, and subsequent scans gradually deepen and widen it. This method can obtain high-quality microgrooves 221 with steep sidewalls and flat bottoms, and can precisely control the final groove width. The platform moves according to the program and etches the parallel microgrooves 221 array on the entire board surface line by line. S6: The processed outer metal plate 21 and inner metal plate 22 are welded along their edges by laser spot welding or micro-beam plasma welding to form an integral louver 2. Then, multiple louvers 2 are firmly welded to the edge of the louver opening 13 of the cabinet body 1 using gas shielded welding according to the tilt angle specified for the specific product. This step completes the manufacturing of the basic louver 2 panel.

[0031] To enhance the hydrophobic effect of the micro-protrusion 211, in another embodiment, a strengthening process is added to the micro-protrusion 211. The plate is placed in a sealed chamber that can be filled with various gases, and the non-treated area is shielded with a custom fixture. First, an inert protective gas is introduced, and then an active gas containing silane or fluorosilane is slowly introduced from the bottom of the chamber. Due to gravity or airflow design, the concentration of the active gas in the chamber gradually decreases from bottom to top. The bottom of the micro-protrusion 211 is exposed to a higher concentration of active gas, resulting in chemical vapor deposition to form a thicker, highly adhesive hydrophobic coating. The top of the micro-protrusion 211 is exposed to a lower concentration of gas, forming a thinner but very dense hydrophobic monolayer. Subsequently, a small amount of corrosive gas may be introduced to slightly corrode and repair the loose coating formed by excessively high concentration deposition, making the gradient transition more natural, thereby forming a tapered micro-protrusion 211 with a gradient.

[0032] refer to Figure 6 As shown, in another embodiment, a process scheme for the interlayer 3 is provided, including: S5-1: Sandwich 3 manufacturing: Using a high-precision injection mold, a plastic sandwich 3 with a complex network of cavities 31, injection port and vent is integrally formed. The cavities 31 can be formed by the movable core in the mold or by the melting process. S5-2: The outer metal plate 21, the inner metal plate 22 and the interlayer 3 are simultaneously placed into a special fixture, connected to the glue injection system, and the cavity 31 system is evacuated to a high vacuum to remove all air and moisture. In the vacuum environment, low viscosity and high flowability modified epoxy resin is injected. Under the vacuum suction and capillary action, the glue quickly penetrates the entire three-dimensional network and overflows evenly from all bonding interfaces 311 to ensure 100% filling. S5-3: Transfer the glue-filled component to an autoclave for the first stage of curing at 50℃-60℃ for 1-2 hours. Then, apply a gas pressure of 0.2-0.8 MPa for low-temperature curing to further eliminate residual micro-bubbles, forcing the adhesive to adhere tightly to the metal surface and offsetting the shrinkage stress during the initial curing stage. During this stage, the adhesive gels and is initially shaped. Then, proceed to the second stage of curing, raising the temperature to 80℃-90℃ and maintaining the pressure for 2-4 hours to fully cross-link the epoxy resin and achieve maximum strength. Gradual heating avoids internal stress caused by sudden temperature changes. After curing, mechanically seal the injection port and vent. This allows the louver unit 2 to withstand significant temperature variations, vibrations, and external impacts, ensuring the long-term effectiveness of the micro-protrusions 211 and micro-grooves 221 on an extremely stable and sealed substrate.

[0033] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A metal cabinet panel, characterized in that: include: The cabinet panel body includes a first side and a second side, the first side facing the outside of the metal cabinet and the second side facing the inside of the metal cabinet; Louvers are formed on the surface of the cabinet panel body; Several louvers are arranged in an array within the louver opening. Each louver includes an outer metal plate and an inner metal plate that are interconnected. The surface of the outer metal plate is provided with an array of micro-protrusions, and the gap between the micro-protrusions is smaller than the cross-sectional diameter of the micro-protrusions. The surface of the inner metal plate is provided with micro-grooves that extend along the length of the louver, and the cross-sectional diameter of the micro-protrusions is smaller than the width of the micro-grooves. The louvers are inclinedly disposed within the louver opening, with the inner metal plate facing the second surface. Water vapor is adsorbed into the micro-groove and flows along the micro-groove under the action of gravity. The outer metal plate faces the first surface, and water droplets converge on the surfaces of two adjacent micro-protrusions and flow along the surface of the louvers under the action of gravity.

2. A metal cabinet panel according to claim 1, characterized in that: The outer metal plate of the louver is tilted at an angle between 120° and 135° relative to the horizontal plane.

3. A metal cabinet panel according to claim 1, characterized in that: The cross-sectional diameter of the micro-protrusion gradually increases from the top to the bottom, with the top of the micro-protrusion forming a hydrophobic portion and the bottom of the micro-protrusion forming a support portion.

4. A metal cabinet panel according to claim 3, characterized in that: The cross-sectional diameter of the hydrophobic part is 1 / 2 of the cross-sectional diameter of the support part.

5. A metal cabinet panel according to claim 1, characterized in that: A sandwich layer is provided between the outer metal plate and the inner metal plate, and the sandwich layer is an integrally molded injection molded part.

6. A metal cabinet panel according to claim 5, characterized in that: A cavity is formed within the interlayer, and the cavity includes several adhesive joints. The openings of the adhesive joints face the surfaces of the inner metal plate and the outer metal plate, respectively. An injection port communicating with the cavity is provided on one side of the interlayer.

7. A method for processing a metal cabinet panel, used to process a metal cabinet panel as described in any one of claims 1-6, characterized in that: The processing method includes: S1: The metal cabinet panel blanks are die-cast separately to form the cabinet panel body. The louver openings for installing louvers are cut on the cabinet panel body. Then, the outer metal plate and inner metal plate are stamped separately to serve as louvers. S2: For the outer metal plate, a layer of ultraviolet-curable resin is uniformly spin-coated onto the surface of the outer metal plate using a hard mold with a micron array pattern. S3: After the UV-cured resin has been left to stand for 30 minutes, align the mold and press it onto the resin layer. Irradiate with a UV lamp for 10-30 seconds to cure the resin and form an array of micro-protrusions. S4: For the inner metal plate, an ultraviolet picosecond laser is used to generate a laser scanning path, and the inner metal plate is fixed on a precision two-dimensional platform. S5: The ultraviolet picosecond laser is focused on the surface. By controlling the laser power and scanning speed, the inner metal plate surface is scanned repeatedly 1-3 times to ablate microgrooves line by line. S6: Weld the formed outer metal plate and inner metal plate into a louver as a whole, and weld and fix multiple louver as a whole to the louver opening of the louver, with the inner metal plate facing the second side and the outer metal plate facing the first side.

8. A method for processing a metal cabinet panel according to claim 7, characterized in that: An outer metal plate with micro-protrusions is placed in a custom fixture, exposing the top of the micro-protrusions. A protective gas is introduced and deposited on the surface of the outer metal plate, gradually exposing the surface of the micro-protrusions to protective gas of different concentrations. The concentration of the protective gas at the bottom layer of the micro-protrusions is greater than that at the top layer. Then, a corrosive gas is introduced to corrode the micro-protrusions, forming a gradient.

9. A method for processing a metal cabinet panel according to claim 7, characterized in that: The processing method also includes: S5-1: The intermediate layer is manufactured by integral injection molding process, and the interlayer is melted into a continuous cavity by melting process, and the end of the cavity is provided with injection port and vent. S5-2: The outer metal plate, the sandwich structure, and the inner metal plate are stacked in sequence, and their injection port and exhaust port are connected to the vacuum injection system; first, the cavity inside the sandwich structure is evacuated, and then, under the condition of maintaining the vacuum, liquid epoxy resin is injected into the channel through the injection port until the epoxy resin overflows from the exhaust port, ensuring that the cavity and the gaps between the joint surfaces are completely filled; S5-3: The injected epoxy resin is cured under the set temperature conditions to combine the outer metal plate, the interlayer and the inner metal plate into a louver as a whole; then the injection port is sealed and the surface is treated.

10. A method for processing a metal cabinet panel according to claim 9, characterized in that: The curing process employs a two-stage gradient heating process: the first stage involves maintaining the temperature at 50-60°C for 1-2 hours to allow the epoxy resin to initially gel and solidify; the second stage involves raising the temperature to 80-90°C and maintaining it for 2-4 hours to enhance the structural strength of the epoxy resin. Simultaneously with the gradient heating and curing, a constant gas pressure of 0.2-0.8 MPa is applied to the surface of the outer metal plate.

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